Unity实现物体运动时画出轨迹

本文实例为大家分享了unity实现物体运动时画出轨迹的具体代码，供大家参考，具体内容如下

1、新建空物体，上赋linerenderer

2、新建空物体，把轨迹画出来，设计和脚本。

3、linemark的脚本是

using system.collections;
using system.collections.generic;
using unityengine;
 
public class linemark : monobehaviour {
 
 
 
 private gameobject clone;  
 private linerenderer line;  
 private int i;  
 public gameobject obs;  
 public gameobject run;  
 vector3 runstart;
 vector3 runnext;
 
 // use this for initialization
 void start () {
  runstart = run.transform.position;
  clone = (gameobject)instantiate(obs, run.transform.position, run.transform.rotation);//克隆一个带有linerender的物体   
  line = clone.getcomponent<linerenderer>();//获得该物体上的linerender组件  
  //  //line.setcolors(color.blue, color.red);//设置颜色  
  //  //line.setwidth(0.2f, 0.1f);//设置宽度  
  i = 0;
 }
 
 // update is called once per frame  
 void update () {  
 
  runnext = run.transform.position;
 
  if (runstart != runnext) {
   i++;
   line.setvertexcount(i);//设置顶点数 
   line.setposition(i-1, run.transform.position);
 
  }
 
  runstart = runnext;
 
 
 
//  if (input.getmousebuttondown(0))  
//  {  
//   clone = (gameobject)instantiate(obs, obs.transform.position, transform.rotation);//克隆一个带有linerender的物体   
//   line = clone.getcomponent<linerenderer>();//获得该物体上的linerender组件  
//   line.setcolors(color.blue, color.red);//设置颜色  
//   line.setwidth(0.2f, 0.1f);//设置宽度  
//   i = 0;  
//   print ("getmousebuttondown");
//  }  
//  if (input.getmousebutton(0))  
//  {  
//   i++;  
//   line.setvertexcount(i);//设置顶点数  
//   line.setposition(i - 1, camera.main.screentoworldpoint(new vector3(input.mouseposition.x, input.mouseposition.y, 15)));//设置顶点位置   
//   print ("getmousebutton");
//
//  }  
 
 
 
 
 }  
}

4、运动小球和脚本

 

run.cs

using unityengine;
using system.collections;
 
public class run : monobehaviour
{
 public gameobject target;   //要到达的目标
 public float speed = 10;    //速度
 private float distancetotarget;   //两者之间的距离
 private bool move = true;    
 
 void start()
 {
  //计算两者之间的距离
  distancetotarget = vector3.distance(this.transform.position, target.transform.position);  
  startcoroutine(startshoot());
 }
 
 ienumerator startshoot()
 {
 
  while (move)
  {
   vector3 targetpos = target.transform.position;
 
   //让始终它朝着目标
   this.transform.lookat(targetpos);
 
   //计算弧线中的夹角
   float angle = mathf.min(1, vector3.distance(this.transform.position, targetpos) / distancetotarget) * 45;
   this.transform.rotation = this.transform.rotation * quaternion.euler(mathf.clamp(-angle, -42, 42), 0, 0);
   float currentdist = vector3.distance(this.transform.position, target.transform.position);
   if (currentdist < 0.5f)
    move = true;
   this.transform.translate(vector3.forward * mathf.min(speed * time.deltatime, currentdist));
   yield return null;
  }
 }
 
 
}

5、目标小球和运动设置的脚本

follew.cs

using system.collections;
using system.collections.generic;
using unityengine;
 
public class followme : monobehaviour {
 
 rigidbody follew;
 // use this for initialization
 void start () {
  follew = getcomponent<rigidbody> ();
 }
 
 // update is called once per frame
 void update () {
 
  transform.translate (new vector3(0.1f,0.1f,0.1f));
 }
}

6、运行结果

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。